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path: root/slideshow/source/engine/transitions/boxwipe.cxx
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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
 * This file is part of the LibreOffice project.
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
 *   contributor license agreements. See the NOTICE file distributed
 *   with this work for additional information regarding copyright
 *   ownership. The ASF licenses this file to you under the Apache
 *   License, Version 2.0 (the "License"); you may not use this file
 *   except in compliance with the License. You may obtain a copy of
 *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
 */


#include <basegfx/matrix/b2dhommatrix.hxx>
#include "boxwipe.hxx"


namespace slideshow::internal {

::basegfx::B2DPolyPolygon BoxWipe::operator () ( double t )
{
    ::basegfx::B2DHomMatrix aTransform;
    double d = ::basegfx::pruneScaleValue(t);
    if (m_topCentered) {
        aTransform.translate( -0.5, 0.0 );
        aTransform.scale( d, d );
        aTransform.translate( 0.5, 0.0 );
    } else {
        aTransform.scale( d, d );
    }

    ::basegfx::B2DPolyPolygon res( m_unitRect );
    res.transform( aTransform );
    return res;
}

}

/* vim:set shiftwidth=4 softtabstop=4 expandtab: */